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经营范围
发明名称
Elément piézoélectrique.
摘要
申请公布号
CH236116(A)
申请公布日期
1945.01.15
申请号
CHD236116
申请日期
1939.11.01
申请人
BELL TELEPHONE MANUFACTURING COMPANY, SOCIETE ANONYME
发明人
BELL TELEPHONE MANUFACTURING COMPANY, SOCIETE ANONYME
分类号
H03H9/02;H03H9/17
主分类号
H03H9/02
代理机构
代理人
主权项
地址
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